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      In Vivo Observation of Trombiculosis with Fluorescence–Advanced Videodermatoscopy

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          Abstract

          Trombiculosis is a skin infestation by larvae of mites of the Trombiculidae family. We used fluorescence–advanced videodermatoscopy to diagnose trombiculosis in a woman in Italy with targetoid patches. This method might be useful for identifying atypical manifestations of trombiculosis.

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          Keys to the genera of chiggers of the western hemisphere (acarina: trombiculidae).

          Synotpic keys to the 87 genera of chiggers in the Western Hemisphere (Nearctic and Neotropical regions) as well as illustrations to the terminology employed, are presented.
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            Neotrombicula inopinata (Acari: Trombiculidae) – a possible causative agent of trombiculiasis in Europe

            Background For over a decade, the presence of trombiculid mites in some mountain areas of La Rioja (Northern Spain) and their association with seasonal human dermatitis have been recognized. This work aimed to establish the species identity of the agent causing trombiculiasis in the study area. Methods Trombiculid larvae (chigger mites) were collected from vegetation in the Sierra Cebollera Natural Park and in Sierra La Hez during an outbreak of human trombiculiasis in 2010. Three specimens collected from a bird were also examined. Identification was made using morphological and morphometric traits based on the most recent taxonomic sources. A comparison of those mites with specimens of the same species collected throughout Europe was performed by means of cluster analysis with multiscale bootstrap resampling and calculation of approximately unbiased p-values. Results All collected mites were identified as Neotrombicula inopinata (Oudemans, 1909). Therefore, this species is the most likely causative agent of trombiculiasis in Spain, not Neotrombicula autumnalis (Shaw, 1790), as it was generally assumed. No chigger was identified as N. autumnalis in the study area. Neotrombicula inopinata clearly differs from N. autumnalis in the presence of eight or more setae in the 1st and 2nd rows of dorsal idiosomal setae vs. six setae in N. autumnalis. Comparison of N. inopinata samples from different locations shows significant geographic variability in morphometric traits. Samples from Western and Eastern Europe and the Caucasus formed three separate clusters. Conclusion Since the taxonomical basis of many studies concerning N. autumnalis as a causative agent of trombiculiasis is insufficient, it is highly possible that N. inopinata may be hiding behind the common name of “harvest bug” in Europe, together with N. autumnalis.
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              Feline trombiculosis: a retrospective study in 72 cats.

              Trombiculosis is the infestation of a host by the larval form of mites belonging to the Trombiculidae family. Few data are available regarding this infestation in cats.
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                Author and article information

                Journal
                Emerg Infect Dis
                Emerging Infect. Dis
                EID
                Emerging Infectious Diseases
                Centers for Disease Control and Prevention
                1080-6040
                1080-6059
                August 2020
                : 26
                : 8
                : 1904-1905
                Affiliations
                [1]Università degli Studi di Torino, Turin, Italy
                Author notes
                Address for correspondence: Alice Ramondetta, Dermatology Clinic, Department of Medical Sciences, University of Turin, via Cherasco 23 Turin, Italy; email: ramondetta.alice@ 123456gmail.com
                Article
                20-0077
                10.3201/eid2608.200077
                7392407
                32687051
                9d541d40-8716-4ff8-8f0e-4362b956dcbf
                History
                Categories
                Dispatch
                Dispatch
                In Vivo Observation of Trombiculosis with Fluorescence–Advanced Videodermatoscopy

                Infectious disease & Microbiology
                mite,arthropod,fluorescence,videodermatoscopy,trombiculosis,vector-borne infections,parasites,italy,neotrombicula autumnalis,dermatitis

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